/*
给出第一个词 first 和第二个词 second，考虑在某些文本 text 中可能以 "first second third" 形式出现的情况，其中 second 紧随 first 出现，third 紧随 second 出现。

对于每种这样的情况，将第三个词 "third" 添加到答案中，并返回答案。

 

示例 1：

输入：text = "alice is a good girl she is a good student", first = "a", second = "good"
输出：["girl","student"]
示例 2：

输入：text = "we will we will rock you", first = "we", second = "will"
输出：["we","rock"]
 

提示：

1 <= text.length <= 1000
text 由一些用空格分隔的单词组成，每个单词都由小写英文字母组成
1 <= first.length, second.length <= 10
first 和 second 由小写英文字母组成

来源：力扣（LeetCode）
链接：https://leetcode-cn.com/problems/occurrences-after-bigram
著作权归领扣网络所有。商业转载请联系官方授权，非商业转载请注明出处。
*/

#include "../stdc++.h"

class Solution {
public:
    vector<string> findOcurrences(string text, string first, string second) {
        vector<string> res{};
        stringstream ss(text);
        string pre1;
        string pre2;
        string s;
        while (ss >> s) {
            if (pre1 == first && pre2 == second) {
                res.push_back(s);
            }
            pre1 = pre2;
            pre2 = s;
        }
        return res;
    }
};

class Solution {
public:
    vector<string> findOcurrences(string text, string first, string second) {
        vector<string> res;
        stringstream ss{text};
        string cur_word{""};
        string word1{""};
        string word2{""};
        while (ss >> cur_word) {
            if (word1 == first && word2 == second) {
                res.emplace_back(cur_word);
            }
            word1 = word2;
            word2 = cur_word;
        }
        return res;
    }
};
